Gleb

If we have many expired items, it can be hard to remove them in main thread. Moved it to background.

Installation and stats didn't work for sqlite. Implemented fixes. I didn't test on mysql, but it shouldn't break.

Added ability to customize hang threshold

1

- Changed default threshold to 3 seconds instead of 2 seconds to get less random hangs - Added ability to customize the threshold to experiment with the threshold in A/B...

- Fix: Add `UserDefaults.synchronize()` to force immediate disk persistence This ensures hang info is saved before app termination during fatal hangs - Add `.startupFatalHang` message type to distinguish from regular...